So, is does this mean for a charity they take 30% also? For example, here's United Way for Chester County (wherever that is)[0]:
https://apps.apple.com/us/app/united-way-of-chester-county/i...
They have a donate button (last image on right). Does Apple take 30% of all that is donated? If so, I find that to be repulsive.
[0] I picked Unite Way because they're a large org, not because of any other reason.